.about-hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 80px 0;
  margin-bottom: 0;
}

.about-logo {
  width: 150px;
  height: 150px;
  object-fit: contain;
  margin-bottom: 30px;
  filter: drop-shadow(0 10px 30px rgba(0,0,0,0.3));
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.hero-badges .badge {
  font-size: 14px;
  padding: 10px 15px;
  margin: 5px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  color: #1a1a1a;
  position: relative;
  padding-bottom: 15px;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  border-radius: 2px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.stat-card {
  background: white;
  padding: 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  transition: transform 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-10px);
}

.stat-icon {
  font-size: 40px;
  margin-bottom: 10px;
}

.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: #667eea;
  margin-bottom: 5px;
}

.stat-label {
  font-size: 14px;
  color: #666;
  font-weight: 600;
}

.service-card, .feature-card {
  background: white;
  padding: 40px 30px;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  text-align: center;
  height: 100%;
}

.service-card:hover, .feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.service-icon, .feature-icon {
  font-size: 60px;
  margin-bottom: 20px;
  display: block;
}

.commitment-box {
  background: white;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.1);
}

.commitment-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px;
  background: #f8f9fa;
  border-radius: 15px;
  transition: all 0.3s ease;
}

.commitment-item:hover {
  background: #e9ecef;
  transform: translateX(10px);
}

.commitment-icon {
  font-size: 40px;
  flex-shrink: 0;
}

.commitment-content h5 {
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 8px;
}

.commitment-content p {
  margin: 0;
  color: #666;
  font-size: 15px;
}

.accordion-button {
  font-weight: 600;
  font-size: 16px;
}

.accordion-button:not(.collapsed) {
  background-color: #667eea;
  color: white;
}

@media (max-width: 768px) {
  .about-hero {
    padding: 60px 0;
  }
  
  .section-title {
    font-size: 28px;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}
/* --- Custom Professional Accordion Styles --- */

.custom-accordion .accordion-item {
  border: none; /* Bỏ viền mặc định */
  background: white;
  border-radius: 16px !important; /* Bo tròn mạnh */
  margin-bottom: 20px; /* Tách rời các câu hỏi */
  box-shadow: 0 4px 15px rgba(0,0,0,0.05); /* Đổ bóng nhẹ tinh tế */
  overflow: hidden; /* Để border-radius hoạt động tốt */
  transition: all 0.3s ease;
}

/* Hiệu ứng khi hover vào khung câu hỏi */
.custom-accordion .accordion-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(102, 126, 234, 0.15);
}

.custom-accordion .accordion-button {
  font-size: 18px;
  font-weight: 600;
  color: #333;
  background: white;
  padding: 20px 25px;
  box-shadow: none !important; /* Bỏ viền xanh mặc định khi click */
  border-radius: 16px !important; /* Bo tròn nút */
}

/* Trạng thái MỞ (Expanded) */
.custom-accordion .accordion-button:not(.collapsed) {
  color: #667eea; /* Màu chữ đổi thành màu chủ đạo */
  background-color: rgba(102, 126, 234, 0.08); /* Nền tím nhạt rất sang */
  box-shadow: none;
}

/* Tùy chỉnh mũi tên (Accordion Icon) */
.custom-accordion .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23333'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transition: transform 0.3s ease;
}

/* Mũi tên khi mở ra thì đổi màu tím */
.custom-accordion .accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23667eea'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
  transform: rotate(-180deg);
}

.custom-accordion .accordion-body {
  padding: 0 25px 25px 25px; /* Căn chỉnh lại padding nội dung */
  color: #555;
  line-height: 1.6;
  background-color: rgba(102, 126, 234, 0.08); /* Đồng bộ màu nền với header khi mở */
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
  .custom-accordion .accordion-button {
    font-size: 16px;
    padding: 15px 20px;
  }
  .custom-accordion .accordion-body {
    padding: 0 20px 20px 20px;
  }
}